In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Reef could be listed as in danger: Qld

There's an increased risk the Great Barrier Reef will end up on a list of World Heritage sites in danger but the Queensland government still hopes to ward that off.

The Queensland and federal governments have sent their latest update on reef protection efforts to UNESCO, which will decide whether the reef should be added to its in-danger list.

Queensland Environment Minister Steven Miles believes the prospect of an in-danger listing is still low, but has increased after a mass coral bleaching event and the defeat of land clearing laws in state parliament.

"I think it's a low possibility at this stage, but certainly higher than what we would have thought coming out of that last meeting (with UNESCO)," Mr Miles had told the ABC.

Earlier this week, scientists who studied the bleaching event said it was caused by climate change and had killed 67 per cent of shallow-water corals in the northern third of the reef.

Leading reef expert Professor Terry Hughes said corals had been cooked in what had been the most pristine part of the ecosystem, and that would make it harder to keep the reef off the in-danger list.

On Friday, Federal Environment Minister Josh Frydenberg said that contrary to some sensationalist reporting "the reef is not dead".